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Start Here EXEMPT No Stormwater Requirements Figure A1. Initial Screening for All Development Projects SFR > 2,500 ft 2 See Figure A4 Is the project Exempt or does not discharge to MS4? Project is < 2,500 ft 2 of new and replaced impervious surface Project is a detached single- family residence? All Others See Figure A2 YES NO Flow Chart to Determine Performance Requirements